Inclined Planes

Paul’s family is moving across town, so his father rented a moving truck for the day. A ramp pulls out of the truck bed. The bed of the truck is 1 m high, and the ramp is 3 m long. Paul makes two statements about the truck ramp:

Statement 1: The ramp is an inclined plane, and we will have to move the boxes a longer distance to get them into the truck than if we lifted them straight up.

Statement 2: Using the inclined plane will require less effort.

• Statement 1 is true and statement 2 is false.

• Statement 1 and 2 are both true.

• Statement 1 is false and statement 2 is true.

• Statement 1 and 2 are both false.

Students want to raise a large crate from the ground to a deck several feet above the ground. They know it will be easier to move the crate along an inclined plane because the inclined plane will —

• reduce the work needed to raise

  the crate.

• increase the force applied to the

  crate

• increase the work done on the

  crate.

• reduce the force necessary to

  raise the crate.

Movers needed to move a heavy box from the bottom of some stairs to the top of the stairs. They placed a ramp over the stairs and pushed the box up the ramp.

Which best explains why the movers used a ramp to move the box?

• The ramp reduced the amount of

  force needed to move the box.

• The ramp increased the height that

  the box needed to be moved.

• The ramp reduced the distance that

  the box needed to be moved.

• The ramp increased the amount of

  friction needed to move the box.

Which simple machine increases the distance over which a load travels and reduces the needed force?

• wheel and axle

• wedge

• pulley

• Inclined Plane

A student is helping his neighbor move a new dishwasher

into their house. The house has three steps on the front

porch that cause the porch to be 2 meters above the ground.

Which method requires the least amount of force to get the dishwasher from the ground to the porch?

• Lift the dishwasher up one step at a time with a partner, and rest

  one minute between steps.

• Place an inclined plane that is 10 meters long over the stairs,

  and roll the dishwasher up the inclined plane with a partner.

• Place an inclined plane that is 5 meters long over the stairs,

  and roll the dishwasher up the inclined plane with a partner.

• Use a fixed pulley attached to the roof of the porch to lift the dishwasher with a

  partner.

When an object is moved up a ramp, you need _________ effort than if it is just picked straight up. 

• More
• Less
• same

When you use an inclined plane to raise an object, the ______ the distance you move it the less force you use.

• shorter

• longer

• distance does not matter

If I want to use the least amount of force neccessary, I would need a 

• long, steep ramp
• short, gentle ramp
• long, gentle ramp
• short, steep ramp

Tags

NGSS.MS-PS2-2

What is this a picture of?

• Ramp
• Screw
• Wedge

A push or pull = Force

• True
• False